House Speaker refuses to back Donald Trump

House Speaker Paul Ryan is refusing to support Donald Trump as the Republican nominee for president, insisting Thursday that the businessman must do more to unify the GOP.

The surprise declaration from Mr. Ryan on CNNâ€™s â€œThe Leadâ€ amounted to a stunning rebuke of Mr. Trump from the Republican Partyâ€™s highest-ranking officeholder.

â€œIâ€™m just not ready to do that at this point. Iâ€™m not there right now,â€ the Wisconsin Republican said. â€œAnd I hope to. And I want to, but I think what is required is that we unify this party.â€

In a statement, Mr. Trump responded that he himself isnâ€™t ready to support Mr. Ryanâ€™s agenda, either.

â€œPerhaps in the future we can work together and come to an agreement about what is best for the American people,â€ Mr. Trump said. â€œThey have been treated so badly for so long that it is about time for politicians to put them first!â€

Even in an election cycle thatâ€™s exposed extreme and very public divisions within the GOP, Mr. Ryanâ€™s decision to withhold his support from Mr. Trump was remarkable, as the GOPâ€™s top elected leader, second in line to the presidency, turned his back on his own partyâ€™s presumptive nominee.

Mr. Ryan had maintained his silence since Mr. Trump effectively clinched the nomination with a commanding win in Indiana on Tuesday that forced his two remaining rivals from the race. Other Republican leaders, including Senate Majority Mitch McConnell, offered their grudging support for Mr. Trump, and Mr. Ryan had seemed likely to eventually do the same.

Instead he balked, in comments that could also reflect concern for his own political future and potential run for president in 2020.

â€œWe will need a standard-bearer that can unify all Republicans, all conservatives, all wings of our party, and then go to the country with an appealing agenda,â€ Mr. Ryan said. â€œAnd we have work to do on this front, and I think our nominee has to lead in that effort.â€

Mr. Ryanâ€™s announcement sent shockwaves through the Republican establishment. Republican National Committee Chairman Reince Priebus, who is close with the speaker, got no advance warning before Mr. Ryanâ€™s comments were made public.

Later Thursday, Mr. Priebus said he had spoken to both men and expected them to work out their differences. In an interview recorded for Fox News Channelâ€™s â€œHannity,â€ he said Mr. Ryan and Mr. Trump â€œare meeting next week to talk about these things.â€

The highly unusual salvos between the likely White House nominee and the House speaker came at a moment when all involved would normally be turning from the intraparty warfare of the primaries to unifying the party for Novemberâ€™s elections. Instead, the Republican Party remains asunder, with prospects for coming together uncertain.

Mr. Ryan made clear he wonâ€™t be supporting Hillary Clinton and wants to come around to backing Trump. And he acknowledged the import of Trumpâ€™s victories over a field of some of the GOPâ€™s most experienced politicians, saying the mogul had â€œtapped into something in this country that was very powerful. And people are sending a message to Washington that we need to learn from and listen to.â€

Mr. Ryan, his partyâ€™s 2012 vice presidential nominee, had been seen as a possible â€œwhite knightâ€ candidate who could emerge as an alternative to Mr. Trump at a contested convention. He called a press conference last month to rule himself out, and Mr. Trump now looks set to gather the 1,237 delegate votes needed to clinch the nomination ahead of the July gathering in Cleveland, foreclosing the contested convention scenario.

Mr. Ryan will serve as the conventionâ€™s chairman, presiding over portions of the proceedings that will elevate Trump to the official status of nominee.

With deep concerns about Mr. Trump at the top of the ticket, Mr. Ryan is positioning himself to play a central role in helping to protect vulnerable Republican House and Senate candidates heading into the general election, said Spencer Zwick, Mr. Ryanâ€™s national finance chairman. Ryan has been working since becoming speaker last fall on an â€œagenda projectâ€ that could give lawmakers something to run on apart from the top of the ticket.

â€œPaul Ryan is the single most effective tool and person to maintain control of the Senate and the House,â€ said Zwick.

â€œHeâ€™s focused on an agenda. Heâ€™s constantly out there talking about his agenda,â€ Zwick said, adding- â€œMany people arenâ€™t sure what the Trump agenda is yet.â€

Mr. Trump and Mr. Ryan have publicly clashed in the past. Mr. Ryan rebuked Mr. Trump for plans to bar Muslims from the country, and when Mr. Trump was slow to disavow former Ku Klux Klan leader David Duke. Mr. Trump told a crowd in South Carolina in February that Mr. Ryan doomed the GOP presidential ticket four years ago by saying entitlement programs need reform.